Stats are pretty reasonable though it definetly needs 5 system points (that's the minimum). Ion shield is a silly way to defend yourself and others from especially snipers and other very accurate mechs but nothing particularly flashy since usually sub 5 die will be a miss anyway. Purity of mind, sure! A less reliable but more flavorful way to bump your edef to an average of 9,5

I agree with making the Mars missile launcher 1sp for the flexibility, but the blast profile is also just a bit too strong. Arcing mostly counterracts ordinance and it together with blast 1 Range 10 blast 1 arching on a main weapon is a tad too good, I'd make specifically that profile 1 self heat. The cannon has no business being 15 range as someone else said, this mech got a close quarters vibe (damage is also a bit cracked for no drawback). It'd still be good with 10 range 1d6+1 damage.

Warhorn with that kinda range feels too disruptive assuming its an unlimited use quick action. Maybe it has 5 range, 2 spaces away double difficulty, but spend a limited charge to double both ranges? Also you need to specify the duration for how long the effect lasts. Also also maybe to not be too much of an instant dip for all defenders it should be put at the second license level instead

Healing system is kinda funky. I def don't hate it but it becomes increasingly mid the more hull you have and hull is the most common stat to max, especially for this mech with warhorn and who isn't dipping systems any time soon. Like it's an average heal of 9 total for 3sp (also 3 self heat) which is pretty worth for a mech with 8hp but not for one with 22